Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam

, T2K Collaboration and Brailsford, Dominic Bevan (2013) Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam. Physical review letters, 111 (21). ISSN 1079-7114

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Abstract

The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to 3.01×1020 protons on target. In the absence of neutrino oscillations, 205±17 (syst) events are expected to be detected while only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum, assuming three neutrino flavors and normal mass hierarchy yields a best-fit mixing angle sin⁡2(θ23)=0.514±0.082 and mass splitting |Δm322|=2.44-0.15+0.17×10-3  eV2/c4. Our result corresponds to the maximal oscillation disappearance probability.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2013 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
67672
Deposited By:
Deposited On:
23 Nov 2013 00:03
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Oct 2020 02:19